Dear buyers, please contact customer service when you see the products you like, don’t worry about pre-ordering, look forward to your welcomeBrand: SMARTOOOLSModel: D1/D size/LR20Chemical type: Lithium batteryNominal voltage: 1.5VNominal capacity: 12000mWhWeight:about 87gSize:about 33*61mmBattery temperature: -20 ℃~60 ℃Battery life: about 1200 timesCharging method: Type-C 5V chargerIndicator light: Flashes during charging and remains on when fully chargedFunction:Flashlight,Gas Stove,Water Heater⭐ after-sale service ⭐If the product you receive is missing a part.Please put all the items you received together, take photos and send them to customer service, explain the parts you are missing, and then mail the parts for you again!If the product you receive is cracked or damaged.Please take photos and send them to customer service immediately, and we will give you a satisfactory reply!If you are satisfied with the product, please give us ⭐⭐⭐⭐⭐ (5 stars), if you have other questions, you can contact us at any time, and we will answer them for you.Enjoy shopping!